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Online since: July 2015
Authors: Alina Spanu, Robert Ciobanu, Maurizio Repetto, Daniel Besnea, Octavian Donţu
Taking into account the catalog data from the manufacturers of permanent magnets, has been chosen a rounded value, alpha = 0.35, resulting in the following width values of permanent magnets xv = 7mm (the width of permanent magnet with cross magnetization), xh = 13mm ( the height of the permanent magnet with axial magnetization).
The equation that characterizes this dependence is of type: (9) In the second experiment, for a fuel flow of 0.3 m3N/ h and a diffusive laminar burning the fuel was treated in a magnetic field of 7000 Gauss and were realized measurements in which the oxygen level in the combustion chamber was changed (fig. 5), so that at the level of the flame at a distance of 200 mm from the exit of the burner, in the point where the probe was introduced, has been obtained a reduction from 1.5% to 1% and 0.5% respectively in the level of oxygen (oxygen reduction was obtained by filling air vents so that air could not enter the combustion chamber).
Through the oxygen reduction from 1% to 0.5% in gas collection point, has been recorded a very small decrease in the amount of nitrogen oxides, accompanied by a substantial increase in the amount of carbon monoxide in the situation when the fuel was treated in a magnetic field.
Acting on excess air during the combustion of the fuel treated in a magnetic field, we obtain a 20% reduction in the level of nitrogen oxides, while the amount of unburned fuel, carbon monoxide respectively, does not exceed that obtained during the normal combustion of natural gas.
The equation that characterizes this dependence is of type: (9) In the second experiment, for a fuel flow of 0.3 m3N/ h and a diffusive laminar burning the fuel was treated in a magnetic field of 7000 Gauss and were realized measurements in which the oxygen level in the combustion chamber was changed (fig. 5), so that at the level of the flame at a distance of 200 mm from the exit of the burner, in the point where the probe was introduced, has been obtained a reduction from 1.5% to 1% and 0.5% respectively in the level of oxygen (oxygen reduction was obtained by filling air vents so that air could not enter the combustion chamber).
Through the oxygen reduction from 1% to 0.5% in gas collection point, has been recorded a very small decrease in the amount of nitrogen oxides, accompanied by a substantial increase in the amount of carbon monoxide in the situation when the fuel was treated in a magnetic field.
Acting on excess air during the combustion of the fuel treated in a magnetic field, we obtain a 20% reduction in the level of nitrogen oxides, while the amount of unburned fuel, carbon monoxide respectively, does not exceed that obtained during the normal combustion of natural gas.
Online since: September 2015
Authors: Jiří Zach, Jitka Hroudová, Martin Sedlmajer, Vítězslav Novák
Introduction
Two basic principles can be applied on building constructions as protection from water and humidity negative effects [1, 2]:
Indirect water-proofing principles – minimisation/reduction of construction moisture load by for instance placement of the object in optimal environment drainage of the adjacent environment to the object, increase of construction surface temperature etc.
In selected time intervals each shaped piece was weighed and from the weighing data the amount of water absorbed in the shaped piece in given time was set.
When the application of hydrophobisation preparations no. 2 and 3 were compared with the reference -not hydrophobised shaped piece, certain reduction of absorptivity was noted, however, this hydrophobisation effect was evaluated as insufficient.
At present the reduction of hydrophobisation effect due to pigment application is the subject of thorough research.
Very effective reduction of walling member absorption was confirmed with all tested concentrations with this preparation even up to the 1:100 concentration.
In selected time intervals each shaped piece was weighed and from the weighing data the amount of water absorbed in the shaped piece in given time was set.
When the application of hydrophobisation preparations no. 2 and 3 were compared with the reference -not hydrophobised shaped piece, certain reduction of absorptivity was noted, however, this hydrophobisation effect was evaluated as insufficient.
At present the reduction of hydrophobisation effect due to pigment application is the subject of thorough research.
Very effective reduction of walling member absorption was confirmed with all tested concentrations with this preparation even up to the 1:100 concentration.
Online since: June 2014
Authors: Roslina Ahmad, Sheikh Akbar, A.W. Tan, Belinda Pingguan-Murphy
Cell proliferation was determined via Resazurin reduction assay.
Cell proliferation was evaluated via Resazurin reduction assay.
Thus, the percentage of Resazurin reduction is directly related to the number of viable cells.
In Fig.3, the percentage reduction of Resazurin on TiO2 nanofibrous surfaces was evaluated relative to control sample.
Data are expressed as averages ± standard deviation (mean ± SD). * indicates p <0.05.
Cell proliferation was evaluated via Resazurin reduction assay.
Thus, the percentage of Resazurin reduction is directly related to the number of viable cells.
In Fig.3, the percentage reduction of Resazurin on TiO2 nanofibrous surfaces was evaluated relative to control sample.
Data are expressed as averages ± standard deviation (mean ± SD). * indicates p <0.05.
Online since: March 2006
Authors: Shun Fa Hwang, Horng Ming Chen
For Type A delamination with 3.0=La or 0.5, similar trend on critical
delamination growth stresses is expected even though some data are not obtained.
On the other hand, comparing to its dramatic reduction on critical buckling stresses, Type B delamination have just slight reduction on critical delamination growth stresses when aaS is increased from 0.1 to 1.0.
This may explain the slight reduction on critical delamination growth stresses as the length of the outer, short delamination is increased.
For Type B delamination, the slight reduction on critical delamination growth stresses may be attributed to that the delamination growth always occurs at the inner, long delamination no matter the length of the outer, short delamination and that the inner, long delamination has the same length for different specimens.
On the other hand, comparing to its dramatic reduction on critical buckling stresses, Type B delamination have just slight reduction on critical delamination growth stresses when aaS is increased from 0.1 to 1.0.
This may explain the slight reduction on critical delamination growth stresses as the length of the outer, short delamination is increased.
For Type B delamination, the slight reduction on critical delamination growth stresses may be attributed to that the delamination growth always occurs at the inner, long delamination no matter the length of the outer, short delamination and that the inner, long delamination has the same length for different specimens.
Online since: April 2010
Authors: Aldo Armigliato, Sandro Solmi, Roberta Nipoti, Francesco Moscatelli, Antonella Poggi, Luca Belsito
The main effect of the N implantation is the reduction
of the electron interface trap density, Dit, located near the conduction band, with a consequent
increase of the electron channel conductivity of the transistor [6].
It was reported [6] that the reduction of the interface states for electron traps is due to the nitridation process here studied.
Such a reduction justifies the here reported increase of nfree but not the mobility trends of Fig. 1.
TEM images also show a good planarity of the SiO2-SiC interface and oxide thickness in good agreement with the data obtained from CV electrical measurements [9].
Among them a bulk mobility reduction by scattering centres due to imperfect SiC network reconstruction or to the presence of interstitial N atoms remain the more reasonable.
It was reported [6] that the reduction of the interface states for electron traps is due to the nitridation process here studied.
Such a reduction justifies the here reported increase of nfree but not the mobility trends of Fig. 1.
TEM images also show a good planarity of the SiO2-SiC interface and oxide thickness in good agreement with the data obtained from CV electrical measurements [9].
Among them a bulk mobility reduction by scattering centres due to imperfect SiC network reconstruction or to the presence of interstitial N atoms remain the more reasonable.
Online since: November 2013
Authors: Darren Martin, Azlin Fazlina Osman, Kevin Jack, Grant Edwards
Both milled and non-milled organofluoromica were used as nanofillers, so that the effects of the milling process and platelet size reduction on the morphology and properties of the TPU nanocomposites could be better optimized and understood.
The characters in the brackets; (1HM) and (2HM) denote the nanofiller size reduction process of 1 hour high energy milling and 2 hour high energy milling, respectively.
However, as the milling time was increased, the peaks became broader and more diffuse, which is attributed to the structural change of the organosilicate, due to a reduction in platelet size and altered surfactant conformations [4,5].
Addition of milled and non-milled 2MED-C resulted in an increase of Tα2 and a reduction in damping capacity in the solvent cast materials.
Table 1: Transition temperature determined from DMTA Processing method Material Damping peaks α1 (°C) α2 (°C) Solvent casting E5-325 -85.5 -4.2 2MED-C -85.4 -2.8 2MED-C (1HM) -87.5 -1.9 2MED-C (2HM) -87.5 14.0 Melt Processing E5-325 -87.0 -2.0 2MED-C -90.0 -3.3 2MED-C (1HM) -88.0 -1.6 2MED-C (2HM) -88.0 13.4 a) b) Fig. 5: DMTA data as a function of temperature: a) damping factor (tan δ) b) storage modulus (E’) for the solvent cast E5-325 (host TPU and nanocomposites).
The characters in the brackets; (1HM) and (2HM) denote the nanofiller size reduction process of 1 hour high energy milling and 2 hour high energy milling, respectively.
However, as the milling time was increased, the peaks became broader and more diffuse, which is attributed to the structural change of the organosilicate, due to a reduction in platelet size and altered surfactant conformations [4,5].
Addition of milled and non-milled 2MED-C resulted in an increase of Tα2 and a reduction in damping capacity in the solvent cast materials.
Table 1: Transition temperature determined from DMTA Processing method Material Damping peaks α1 (°C) α2 (°C) Solvent casting E5-325 -85.5 -4.2 2MED-C -85.4 -2.8 2MED-C (1HM) -87.5 -1.9 2MED-C (2HM) -87.5 14.0 Melt Processing E5-325 -87.0 -2.0 2MED-C -90.0 -3.3 2MED-C (1HM) -88.0 -1.6 2MED-C (2HM) -88.0 13.4 a) b) Fig. 5: DMTA data as a function of temperature: a) damping factor (tan δ) b) storage modulus (E’) for the solvent cast E5-325 (host TPU and nanocomposites).
Online since: February 2012
Authors: Mohsen Badrossamay, Alireza Fadaei Tehrani, Hamid Montazerolghaem
Moreover, too much indentation and reduction in the cross sectional thickness of the weld joint can be resulted when increasing the axial force [6].
The selected dynamic model was compared with the experimental data in ref. [13].
Axial welding force (N) FSW VAFSW Fig. 3 Axial welding force reduction by applying the vibration Design of experimental (DOE) results The purpose of this part of research is to identify the relationships between the set of design parameters.
Force reduction of 6 to 17% during the friction stir welding was observed when applying the vibration.
Due to reduction in axial force, the tool life can be increase.
The selected dynamic model was compared with the experimental data in ref. [13].
Axial welding force (N) FSW VAFSW Fig. 3 Axial welding force reduction by applying the vibration Design of experimental (DOE) results The purpose of this part of research is to identify the relationships between the set of design parameters.
Force reduction of 6 to 17% during the friction stir welding was observed when applying the vibration.
Due to reduction in axial force, the tool life can be increase.
Online since: June 2014
Authors: Gelmires Araújo Neves, J.M.R. de Figueirêdo, Juliana Melo Cartaxo, Heber Carlos Ferreira, P.L. de Oliveira
According to Table 3, there was a significant reduction of the mean equivalent size of the particles after the hydrocycloning process, the increase in the clay content and diminution of the sand content.
It can observe the reduction of the SiO2 content in all cases after the purification level, as well as a slight increase of the loss on ignition, indicating a higher concentration of the clay fraction.
Relating the diffractograms of the purified samples and the non-purified ones, it can be noticed that there is a considerable reduction in the intensities of the peaks associated to quartz and kaolinite in the purified samples.
This result confirms the data of granulometric analysis previously presented and proves the efficiency of the purification process by hydrocycloning.
According to XRD, there was a reduction in the peaks of quartz.
It can observe the reduction of the SiO2 content in all cases after the purification level, as well as a slight increase of the loss on ignition, indicating a higher concentration of the clay fraction.
Relating the diffractograms of the purified samples and the non-purified ones, it can be noticed that there is a considerable reduction in the intensities of the peaks associated to quartz and kaolinite in the purified samples.
This result confirms the data of granulometric analysis previously presented and proves the efficiency of the purification process by hydrocycloning.
According to XRD, there was a reduction in the peaks of quartz.
Online since: February 2015
Authors: Zhen Zhong Shen, Li Qun Xu, Zhong Qi Yan
According to the geological survey data and laboratory test results, the permeability coefficients of geologic stratification and dam districts are shown in Table 1 and Table 2.
The elevation of soakage face and the head reduction are given in Table 4.
Fig.3 Equipotential line graph of typical section in scheme DSX-1 Table 4 Elevation of soakage face and the head reduction Scheme Soakage face in cushion(m) Head reduction(m) Head reduction percentage(%) DSX-1 1521.55 188.45 82.27 DSX-2 1520.54 189.46 82.71 DSX-3 1522.77 187.23 81.74 DSX-4 1518.94 191.06 83.41 DSX-5 1522.79 187.21 81.73 DSX-6 1526.29 183.71 80.21 Seepage gradient.
The elevation of soakage face and the head reduction are given in Table 4.
Fig.3 Equipotential line graph of typical section in scheme DSX-1 Table 4 Elevation of soakage face and the head reduction Scheme Soakage face in cushion(m) Head reduction(m) Head reduction percentage(%) DSX-1 1521.55 188.45 82.27 DSX-2 1520.54 189.46 82.71 DSX-3 1522.77 187.23 81.74 DSX-4 1518.94 191.06 83.41 DSX-5 1522.79 187.21 81.73 DSX-6 1526.29 183.71 80.21 Seepage gradient.
Online since: July 2011
Authors: Jiang Qi Long, Zhong Gen Su
Using electronically controlled EGR technology can precise control EGR rate under the different engine conditions, it is as much as possible reduction of NOx emissions under effectively maintaining the performance requirements of diesel engine.
The control panel has the functions of data collection, determining the conditions, the coordination of the subroutine, controlling signal output.
The data of Table 1 show that NOx emissions total reduces 30.9% subject to diesel engine performance after the use of electronically controlled EGR system.
In contrast, change of EGR rate has obvious effect on the diesel engine performance at high load, the use of big EGR rate brought a significant reduction in NOx, but will bring a rise in particles emissions and the significant increase of the fuel consumption.
The control panel has the functions of data collection, determining the conditions, the coordination of the subroutine, controlling signal output.
The data of Table 1 show that NOx emissions total reduces 30.9% subject to diesel engine performance after the use of electronically controlled EGR system.
In contrast, change of EGR rate has obvious effect on the diesel engine performance at high load, the use of big EGR rate brought a significant reduction in NOx, but will bring a rise in particles emissions and the significant increase of the fuel consumption.